The U.S. Food and Drug Administration granted accelerated approval to Padcev (enfortumab vedotin-ejfv), a Nectin-4-directed antibody and microtubule inhibitor conjugate, meaning the drug specifically targets cancer cells – in this case, the cell adhesion molecule Nectin-4, which is highly expressed in urothelial cancers. Padcev is indicated for the treatment of adult patients with locally advanced (when cancer has grown too large to be surgically removed) or metastatic (when cancer cells spread to other parts of the body) urothelial cancer who have previously received a programmed death receptor-1 (PD-1) or programmed death ligand 1 (PD-L1) inhibitor and a platinum-containing chemotherapy. Platinum-containing chemotherapy, PD-1 and PD-L1 inhibitors are standard treatments for patients with bladder cancer, the sixth most common cancer in the U.S. Urothelial cancer, accounting for more than 90% of bladder cancers, begins in cells that line the bladder and nearby organs. Padcev represents a new type of therapy for patients with advanced urothelial cancer whose disease has progressed on chemotherapy and immunotherapy.
The most common side effects for patients taking Padcev were fatigue, peripheral neuropathy (nerve damage resulting in tingling or numbness), decreased appetite, rash, alopecia (hair loss), nausea, altered taste, diarrhea, dry eye, pruritis (itching) and dry skin. Patients may experience hyperglycemia (high blood sugar levels) regardless of whether they have diabetes or not, and blood sugar levels should be monitored closely in patients receiving Padcev. Patients should also be monitored for new or worsening peripheral neuropathy and have the dose of Padcev interrupted, reduced or discontinued if needed. Patients may experience eye disorders, including dry eyes and vision changes, while taking Padcev. Health care professionals may consider prophylactic artificial tears for dry eyes and referral to an ophthalmologist for any new symptoms related to the eye. Patients who experience infusion site extravasation (leakage of medications administered through veins into the surrounding tissue) may experience delayed extravasation site reactions with pain, blisters and peeling of skin. Adequate venous access should be ensured prior to starting Padcev.
The FDA advises health care professionals to tell patients of reproductive age to use effective contraception during treatment with Padcev, and for a period of time thereafter. Women who are pregnant or breastfeeding should not take Padcev because it may cause harm to a developing fetus or newborn baby, or cause delivery complications.
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